I have a laptop with switchable graphics, that's why I can run games on Intel graphics or AMD GPU.

And idTech 5 is a shame. Almost no customizable option in menus, performance problems on a lot of computers... For me, games made with idTech 5 stutter with the AMD GPU, and I can't find why. Maybe AMD is fautive with its drivers or the "Enduro" technology, but the engine is a part of the problem. I tried several solutions, without success...

The only solution working is running the games with the Intel graphics, it's still playable but in Doom 3, the resolution isn't right, that's why I'm posting here.However, thanks for the command, I will try that later and post if it's working or not :)

I can't use the computer with only the AMD GPU running (some laptop have this option in BIOS), but I can assign a GPU to every game/application I have, in the CCC.I already tried without Catalyst AI, in vain.

Nevermind, these games are not really heavy, and the iGP can run them pretty well.

Right, I know that. I am saying that in such laptops as yours, when you switch off power saving and go into performance mode, the system switched to AMD GPU automatically, permanently, until you set energy saving option back on.

I think this is the "Powerplay" option in the CCC, but it doesn't automatically swith to the AMD GPU in my case (and I always play in High Power mode).But maybe it works like that if the laptop works in Fixed mode ; there is two switchable graphics mode, depending of the laptop:- Fixed mode: the switch between iGP and GPU depends of the power source (so maybe power plan also).- Dynamic mode: it works the way I described before, my laptop uses this mode.

This technology was problematic when updating drivers, but it seems to be a bit better now, we can finally update Intel and AMD drivers independantly (atleast with a recent configuration, not sure if it works with older processors and graphic cards...)